Hammer mill



C. B, SCHUR HAMMER MILL Dec. 5, 1933.

Filed Oct. 18. 1952 2 Sheets-Sheet 1 7. r M. u y 4 h w MJ M, Q m V ,a v.0 5 -IIT M u 1 1 7 \.--./Q md Q w af/Nl\\\ Z QL Z d MIU* Z/ \F [au KM Nwau ad 3 7 .M /l .J L L M l caw O ,bo a Q be /0 O r n. i w/ T n Dec. 5,1933. C B SCHUR 1,938,500

HAMMER MILL Filed Oct. 18. 1932 2 Sheets-Sheet 2 L A a n n i j miPatented Dec. 5, 1933 HAMMER MILL Charles B. Schur, Minneapolis, Kans.

Application October 18, 1932. Serial No..638,422

11 Claims.

This invention relates to a pulverizing mill or machine of the hammertype designed primarily for pulverizing and reducing stock feed, but itis to be understood that a mill or machine, in accordance with thisinvention may be employed in any connection for which it may be foundapplicable, and the invention has for its object to provide, in a manneras hereinafter set forth, a mill or machine of the class referred toincluding means so constructed and arranged to increase the capacity ofthe mill or machine, the amount of roughage and to enable the grindingof damp or'tough feed.

A further object of the invention is to set up, in a manner ashereinafter set forth, a mill or machine of the hammer type whereby itwill provide for the cutting of the feed before the latter reaches thehammers.

A further object of the invention ris to provide,

in a manner as hereinafter set forth, a mill or machine for the purposereferred to with a set of spaced, bodily movable hammer elements andwith one of the outer elements of said set provided with a pair ofoppositely disposed knives coacting'with a cutter bar for cutting thefeed before action thereon by the hammers whereby provision is had forthe grinding of damp or tough feed in a satisfactory manner.

Further objects of the invention are to provide, in a manner ashereinafter set forth, a mill or machinefor the purpose and advantagesreferred to which is simple in its construction and arrangement, strong,durable, compact, thoroughly efficient in its use, conveniently repairedwhenoccasion requires, and comparatively inexpensive to manufacture. y

To the above ends essentially and to others which may hereinafterappear, the invention consists of such parts and such combination ofparts which fall within the scope of the invention as claimed.

In the drawings:-

Figure 1 is a top plan view of a mill or machine in accordance with thisinvention and illustrated with the hood element tilted back at an angleof approximately forty-five degrees.

Figure 2 is a section on line 2 2 Figure 1 with the hood element inclosed position.

Figure 3 is a section on line 3--3 Figure l with the hood element inclosed position.

Figure 4 is a perspective view of that hammer element of the set towhich the knives are coupled.

Figure 5 is a perspective view of the reinforcing member for the hammerelement shown in Figure 4 and against which is to be secured thevknives.

Figure 6 is a perspective view of the form of knife employed. y

Figure 'i' is a like View of a spacer for the hammer elements.

Referring to the drawings, 1 denotes an open top and bottom housing ofrectangular contour and which comprises side walls 2, 3, end walls 4, 5and inwardly extending oppositely disposed iianges 6, 7 at the upperends of the walls 4, 5 respectively. The housing 1 provides a' chamber 8for the reception of the treated feed stuff.` The wall 5 is cutout as at9 to form an openingso that access can be had to chamber 8, and suchopening is normally closed by a vertically movable gate 10 slidablyconnected against the outer face of wall 5. Secured to the inner facesof the walls 2, 3 and to the inner ends of flanges 6, 7 is asemi-circular screen 11 which depends into housing 1 and forms inconnection withthe flanges 6, 7 the top wall of chamber 8.

Journaled in the walls 2, 3 and extended from*y wall 2 is a rotatableshaft 12 having that endv which is extended from wall 2 provided with apulley 13 for connection to a driving means, not shown for shaft 12.Fixed to the latter and bodily movable therewith are two sets of hammerVelements. The elements of one set extend at right angles to the elementsof the other set. The elements of one set are indicated at 14. One outerelement of the other set is indicated at 15 and the other elements ofsuch set are designated 16. Each of the hammer elements consists of anoblong bar split in alignment with its longitudinal median at each end,as at 18, 19. The element 15 is provided in proximity to one side edgebetween its transverse center and one end with a row of spaced openings20 and in proximity to its other side edge between its transverse centerand other end with a row of spaced openings 21. Each hammer element atthe intersection of its transverse and longitudinal medians is formedwith an opening 22.

The openings 22 in the hammer elements align with each other andextending through such aligning openings is the shaft 12, and mounted onthe latter are spacing collars 23 arranged between elements 14 and 16, aspacing collar 24 arranged between one of the outer elements 14 and wall2 and a spacing collar 25 opposing Wall 3.

Coupled with the element 15 is a pair of op-y positely disposed knives26, 27 respectively of substantially frusto-triangular form. The knivesare of like form and each consists of a body part 28 increasing in widthfrom its inner to its outer end and having one lengthwise edge straightand squared and its other beveled to provide a cutting edge. The innerend 29 of body part 28 is concaved and its outer end 30 oppositelyinclined. The body part 28 in proximity to its straight lengthwise edgeis formed with a set of spaced openings 31.

Associated with the element 15 is a reinforcing member 32 therefor andwhich extends throughout one face of such element. The member 32 is inthe form of a bar having a wide intermediate part 33 and a pair ofreduced outer parts 34, 35 offset with respect to each other. The parts34, 35 have rows 36, 37 respectively of spaced openings. 'I'heintermediate part 33 is formed with a central opening 38 which is toalign with the opening 22 in element 15. The openings 36 are to alignwith the vopenings 20 and the openings 37 are to align with 'theopenings 21. The openings 31 of knife 26 are to align with the openings36 and the openings 31 of knife 27 are to align with openings 37.Holdfast devices 39 extend through aligning openings 20, 36 and 31 forxedly securing element 15, member 32 and knife 26 together. Holdfastdevices 40 extend through aligning openings 21, 37 and 3l for fixedlysecuring element l5, member 32 and knife 26 together. The knives 26, 27project laterally in opposite directions from the member 32. The collar25 opposes the inner ends of the knives 26, 27.

Extended laterally from the side wall 3 of housing 1 and positionedadjacent one side of shaft 12 is a platform or trough 41 for the stockwhich is fed to the-machine. Platform 41 has upstanding Aflanges 42 atits sides to retain the stock thereon. The side wall 3 has a lateralflange 43 upon which the inner end of platform 41 is mounted. Secured toflange 43 is an upstanding inverted yoke shaped guard 44 which extendsacross platform 41. Mounted upon the inner end of the latter is a cutterbar support 45 and positioned on the latter, as well as being adjustablerelative thereto is a cutter bar 46 which extends inwardly from theinner edge of support 45 'a sufficient distance to coact with the knives26, 27. Holdfast means 47 extend through platform 41, support 45 andcutter bar 46, the latter being formed'with slots 48 to permit of itsadjustment relative to support 45.Y The holdfast means 47 extend throughslots 48.

`Hinged to one end of walls 2, 3, as at 49 is a hood 50 for housing 1and which has a supporting extension 51 therefor when it is swungcompletely olf the housing. One side of hood 50 is to guide the stock tothe latter.

cutout as'at 52 to form a clearance for the guard when 'the hood isseated upon the housing, and such side is formed with a pair ofoutwardly directed parallel spaced arms 53 merging into an'upwardlyinclined guide 54 which, when the hood'is in closure or coveringposition, extends transversely off the platform 41 and outwardly withrespect to the support 45 and cutter bar 46 See Figure 3.

What I claim is:-

1. In a mill for the purpose set forth, oppositely disposed sets ofspaced hammer elements bodily revolving together, a reinforcing memberpositioned lengthwise of one of the outer elements of one of the sets,oppositely disposed knives positioned against one side of said member,means for securing'said element, member and knives together, and acutter bar co-related with Said knives,

2. In a mill of the hammer type, a housing, a hinged hood for thelatter, a platform extended from the housing for the stock to betreated, a cutter bar support on the platform, a cutter bar mounted onthe support and extended inwardly therefrom, revoluble hammer elementswithin the housing and one provided with stock cutting means coactingwith said bar, a guard arranged over the cutter bar, and said hoodhaving stock guiding means for extension across said platform outwardlywith respect tothe cutterv bar when the hood is closed.

3. In a mill of the revolving hammer type, a bodily revoluble set ofspaced parallel hammers, a reinforcing member connected to and bodilycarried with one of the hammers of the set, oppositely disposed cuttermeans bodily carried with said member, and a stationary cutter baralternately coacting with said cutting means.

4. In a mill for the purpose set forth, a bodily revoluble set ofparallel spaced oblong hammer elements, a pair lof oppositely extendingknives, means for securing said knives with and length'- wise of one ofthe outer elements of said set, said knives bodily carried by saidelement, an adjustable cutter bar coacting with said knives, a platformfor the stock to be treated, a cutter bar support upon the 'inner end ofthe platform, a guard arranged over the cutter bar, and a stock guide onthe platform leading upwardly to said cutter bar.

5. In a mill of that type including revolving hammer elements, thecombination with one of the hammer elements thereof, said element beingformed with two'rows of openings, of a reinforcing member positionedlengthwise of one side of said element and having openings registeringwith the openings of the latter, a pair of oppositely disposed knivespositioned lengthwise of one side of said member and having openingsregistering 1.15. with the openings o f the latter, and holdfast meansextending through the registering openings for xedly seeming saidelements, member and knives together.

`6. In a'mill of that type including revolving hammer elements, thecombination'with one of the hammer elements thereof, Ysaid element`being formed with two rows of openings, of a reinforcing memberpositioned lengthwise of one side of said element and having openingsregistering with the openings of the latter,"a pair of oppositelydisposed knives positioned lengthwise of one'side of said memberandhaving openings registering with the openings of the latter, holdfastmeans extending through the registering openings for fixedly securingsaid elements, member and knives together, and a cutter bar arrangedadjacent to said element and coactingr with said knives.

7. In a hammer mill, a revolving oblong hammer element provided at eachend with a split disposed lengthwise thereof, -said element providedadjacent each of its lengthwise edges with a row of spaced openings,said rows offset with respect to each other, a reinforcing member havingone side face positioned against one side face of said element andformed with rows of openings aligning with the openings of said element,a pair of oppositely disposed cutters having one side face thereofpositioned against the other side face of said member and each formedwith a row of openings registering with a row of openings in saidmember, and holdfast means extending through the registering openingsfor Xedly securing said element, member and cutters together.

8. In a hammer mill, a driven shaft, a bodily revoluble set of parallelspaced oblong hammer elements of like form, each provided at theintersection of the longitudinal and transverse medians thereof with anopening for securing the element to said shaft, each of said'elementshaving each of its ends slitted lengthwise thereof, and cutting meansfixedly secured with one side of the outer element of the set and bodilycarried therewith.

9. In a hammer mill, a driven shaft, a bodily revoluble set of parallelspaced oblong hammer elements of like form, each provided at theintersection of the longitudinal and transverse medians thereof with anopening for securing the element to said shaft, each of said elementshaving each of its endsslitted lengthwise thereof, a reinforcing memberdisposed lengthwise of the outer side face of the outer element of saidset, cutting means disposed lengthwise of the outer side face of saidmember, and means for clamping the said outer element, member andcutting means together.

10. In a hammer mill, a casing provided with an intake, a bodilyrevoluble set of parallel spaced oblong hammer elements operating in thecasing, means located to one side for said intake and connected to saidelements for bodily revolving said set, cutting means xedly secured withthe outer side face of the outer element of said set and bodily carriedby such element, the

said outer element revolving in a path in close proximity to saidintake, a platform for the stock to be treated extended into saidintake, a cutter bar support mounted upon the inner end of the platform,a cutter bar connected to the support, extending into said casing andrcoacting with said cutting means, and an inclined stock guide on theplatform leading to said cutter bar support.

11. In a hammer mill, a casing provided with an intake, a bodilyrevoluble set of parallel spaced oblong hammer elements operating in thecasing, means located to one side for said intake and connected to saidelements for bodily revolving said set, cutting means xedly secured withthe outer side face of the outer element of said set and bodily carriedby such element, the said cuter element revolving in a path in closeproximity to said intake, a platform for the stock to be treatedextended into said intake, a cutter bar support mounted upon the innerend of the platform, a cutter bar connected to the support, extendinginto said casing and coacting with said cutting means, an inclined stockguide on rthe platform leading to said cutter bar support, and a stockguide arranged at the inner end of the platform and extending upwardlyfrom the sides of the latter and over said cutter bar.

CHARLES B. SCHUR.

